<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button>删除</button>
    <script>
        // var res = confirm('确定关闭么？');
        // console.log('res: ', res);

        var oBtn = document.querySelector('button');
        oBtn.onclick = function(){
            if(confirm('确定关闭么？')){
                console.log('删除');
            }else{
                console.log('什么没发生')
            }
        }
        
    </script>
</body>
</html>